For those of you whom are eager to get your hands on the Lost in Nightmares DLC and extra costumes for Chris and Sheva for RE5 - the wait is over, it's available on the Xbox Live Marketplace now for 400 MSP! The Lost in Nightmares DLC contains an additional 5 unlockable achievements worth 100 gamerpoints. There's also an additional mode thrown in as an added bonus called "The Mercenaries Reunion" which helps breath new life into the Mercenaries mode with additional characters and some varied moves.
I had the pleasure of playing through the Lost in Nightmares DLC this morning and I had a blast. I'll be posting my review of the DLC later on.